I saw these on the ol' internet. Lightweight but look to be expensive. $30K.
Earth Traveler Teardrop Trailers
We design and fabricate ultralight teardrop trailers with a unibody and aerodynamic design, that can be towed practically by any size vehicles or electrified models, having a minimum impact on the vehicle range and battery life. Perfect for the environmentally-minded travelers who want to maintain a
www.earthtravelerteardroptrailers.com